Heating attachment for stoves



(No Model.) M. G. MQGUIRE.

HEATING ATTACHMENT FOR STOVES.

No. 318,774. Patented May 26, 1885.

n. mens, Pholo-Lnhoguphur. Washington. a. c.

ll'nirnn Srarns ATENT triers.

MICHAEL G. MCGUIRE, OF CHICAGO, ILLINOIS.

HEATING ATTACHMENT FOR STOVES.

SPECIFICATION farming part of Letters Patent No. 3l8,'774-, dated26,1885.

Applicatirn filed January 13, 1855.

To all whom it may concern:

Be it known that I, llLIICHAEL G. MoGUrRn, residing at Chicago, in thecounty of Cook and State of Illinois, and a citizen of the UnitedStates, have invented a new and useful Improvement in HeatingAttachments for Stoves, of which the following is a full description,reference being had to the accompanying drawings, in which Figure 1 is avertical sect-ion applied to a common stove; Fig. 2, a vertical sectionshowing a modified form of the interior partition; Fig. 3, an under endview, and Fig. 4 a crosssection.

The object of this invention isto construct and apply a heatingattachment to a stove, so that the heated products of combustion, afterthey have escaped from the stove, will be carried down toward or nearthe floor before ascending for their final exit, and to provide theattachment with such dampers and registers that the movement of thecurrent can be controlled and cold or additional air admitted to consumegases which may escape in sufficient quantity to burn.

The object of my invention I accomplish in the manner and by theconstruction and combination of devices hereinafter described andclaimed.

In the drawings, A indicates the exterior casing or shell; B, thepartition; C D, fines or passages; E, damper; F, connecting side pipe orjoint; G, base-plate; H I, air passages or registers, and J K secondarypartitions and damper.

The shell A is usually made of sheet or stovepipe iron, somewhat conicalin form, as shown, and will constitute a downward extension of thestove-pipe, the latter being connected with the upper open end of theshell. The degree of enlargement toward the bottom will or may dependupon the kind of fuel used in the stove to which it is to be applied. Ifit is to be used in connection wit-h a wood-stove, eight inches indiameter at the bottom will be sufficient fora shell formed at the topto receive a section of six-inch pipe. From eight to ten inches willalso be a sufficient enlargement for anthracite or hard coal, while fromten to twelve inches is preferable for bituminous or soft coal, and inburning wood I have obtained (No model.)

good results with a cylindrical instead ofa conical attachment. Thetapering form of the shell or pipe section, as described, brings theenlarged end at the bottom, and thereby serves to spread the flame atthis point, so that I avoid burning out the partition or shell where theflame passes around the shell,which might occur were the flameconcentrated by making the shell of the same diameter throughout.

As shown in Fig. 4, the shell and partition are both formed from asingle piece of sheetiron, the edge of the partition being bent, as ata, while on the opposite side it is folded, as at b, and then passesaround until the edge a is reached, where it is again folded, so as tolock the edge or end a, and again carried around and the opposite edgeor end bent, as at d, to enter the told I). \Vhen these folds or crimpsare compressed, the edges or ends a b are locked in position, and adevice is formed which is not affected by the contraction or expansionof the metal, and one which will hold its shape and form better thanwhen put together by rivets. The shell, however, may be formed andcrimped or folded so as to receive a separate partition, if desired,and, if desired, the entire device may be made of light cast-iron, whichwill be desirable for some forms of stoves.

The end plate, G, and registers H I are of cast-iron in the form shown;but the form may be varied.

The pipe sect-ion or shell A is constructed with a laterally-projectingtubular neck, F, for engaging the ordinary pipe-collar, F, of a stove,for suspending the shell, and this neck is only of such length as toproperly engage the pipeeollar, in order to bring the shell in closeproximity to the stove, whereby the heat radiated from the lattermaterially contributes to the heating of the shell. The pipe section orshell is formed above the lateral tubular neck into anupwardly-projecting tubular shank or 8X- tension, F containing thedamper E, and serving to connect with the stove-pipe E, the partition Brising past the neck F into the shank or extension F so as to supportthe damper and act in conjunction therewith above the neck which securesthe shell to the pipecollar.

I term the device a suspension attachment, in that it hangs from thepipe-collar, and ordinarily no supporting feet or legs will be used.

In operation, when the damper E is in the position shown, the productsof combustion pass down the flues 0, across the plate G, and ascend theflue D to a pipe connected with the chimney or final exit, and thedamper E will ordinarily remain in the position shown; but for startingfires it may be turned upward to give a direct draft.

Itwill be seen that the register His located at the bottom of thestove-pipe extension composing the heater, so that a current of cold aircan be turned in, which in and of itself has a tendency to carryor-bring down the products of combustion from the stove, and by the useof this damper the draft can be thoroughly regulated, and the airpassingin at this point, as I have found by actual test, frequentlycauses the attachment or device to operate as agas-burner, a flame beingformed as the productsofcombustion pass under the partition B from theflue O. This control of the currents can be further regulated by theregister I; but for cheap forms of attachments this register I may beomitted, as the control given by the register H will be sufficient.

The partition J and damperK are only ap plied in cases where the draftis unusually strong, as the devices produce better results when theproducts of combustion do not pass too rapidly through it. When thedamper K is thrown over against the partition B, the device of Fig. 2does not differ in its operation from that of Fig. 1; but when throwndown, as shown, a second return of the products ofcombustion is caused,thus checking a strong draft without letting too much air through theregister.

, I have found by actual test that this attachment results in a materialsaving of fuel,and a marked increase in the heating effect of the fuelconsumed. As the natural tendency of heated air is to rise, by bringingthe heated products ofcombustion down near the floor outside of thestove, the warming of the lower colder portions of the room is greatlyfacilitated and increased, and by letting a portion of the cold airthrough the heatingattachment the device also operates to some extent asa circulator or means of escape of the colder air, so that the stratumof warmer air reaches the floor much sooner than it otherwise would.

In the form shown the device is circular its entire length; but it maybe made oval or flattened at the lower end, to avoid projecting too farinto the room. The device may be applied to stoves having a verticalpipe-collar by the employment of an additional elbow at the tubular neckF.

I am aware that partitions for doubling the movement of the current ofheated products of combustion have been heretofore applied to stovepipes and drums located on top of the stove and in sections of pipeabove the stove; but these devices do not bring the otherwise wastedheat down to or near the floor, and cannot be used as circulators forthe exterior air.

I do not claim, broadly, the partition B and damper E; but

What I claim as new, and desire to secure by Letters Patent, is-

l. The suspension pipe-section A, having the lateral tubular neck 1 andupward tubular shank or extension F in combination with a register, H,at the bottom ofthepipe-section, the partition B, extending past theneck and into the tubular shank or extension, and the damper E, pivotedto the upper end ofthe partition, substantially as described.

2. The tapering pipe-section A, having its largest diameter at thebottom, and provided with the bottom register, H, and tubular neck F, incombination with the partition B, extending above the neck, and adamper, E, 'also above the neck, substantially as described.

3. The suspended pipe-section A,having one or more diving-fines and oneor more ascending flues, in combination with the bottom register, H, andthe register I in the upper portion of the pipesection, substantially asde scribed.

MICHAEL G. MCGUIRE.

Witnesses:

ALBERT H. ADAMS, MARIE L. PRICE.

